{
  "manageEntity": {
    "action": "Save",
    "entityId": "52549627",
    "entityType": "Track",
    "nonce": "0x285c8676229e9f365bacc6fa59c4e19b842abf1c877c1428fe568591593dd6fa",
    "signature": "0xc807b411598c534116eb5e9f00dbec6b97028a66e71138b907316a36df9f95f26f5426ef46b22546f29fb01d9c8ebcfd1b4408b98d2d9af542047449e1d025621b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}